mirror of https://github.com/bkaradzic/bgfx
539 lines
13 KiB
C++
539 lines
13 KiB
C++
/*
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* Copyright 2014 Dario Manesku. All rights reserved.
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* License: http://www.opensource.org/licenses/BSD-2-Clause
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*/
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#include <vector>
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#include <string>
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#include "common.h"
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#include "bgfx_utils.h"
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#include "imgui/imgui.h"
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#include "nanovg/nanovg.h"
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#include <bx/readerwriter.h>
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#include <bx/string.h>
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static float s_texelHalf = 0.0f;
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struct Uniforms
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{
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void init()
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{
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m_time = 0.0f;
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bx::mtxIdentity(m_mtx);
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u_mtx = bgfx::createUniform("u_mtx", bgfx::UniformType::Mat4);
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u_params = bgfx::createUniform("u_params", bgfx::UniformType::Vec4);
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u_flags = bgfx::createUniform("u_flags", bgfx::UniformType::Vec4);
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u_camPos = bgfx::createUniform("u_camPos", bgfx::UniformType::Vec4);
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u_rgbDiff = bgfx::createUniform("u_rgbDiff", bgfx::UniformType::Vec4);
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u_rgbSpec = bgfx::createUniform("u_rgbSpec", bgfx::UniformType::Vec4);
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}
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// Call this once per frame.
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void submitPerFrameUniforms()
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{
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bgfx::setUniform(u_mtx, m_mtx);
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bgfx::setUniform(u_flags, m_flags);
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bgfx::setUniform(u_camPos, m_camPosTime);
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bgfx::setUniform(u_rgbDiff, m_rgbDiff);
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bgfx::setUniform(u_rgbSpec, m_rgbSpec);
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}
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// Call this before each draw call.
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void submitPerDrawUniforms()
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{
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bgfx::setUniform(u_params, m_params);
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}
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void destroy()
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{
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bgfx::destroyUniform(u_rgbSpec);
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bgfx::destroyUniform(u_rgbDiff);
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bgfx::destroyUniform(u_camPos);
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bgfx::destroyUniform(u_flags);
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bgfx::destroyUniform(u_params);
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bgfx::destroyUniform(u_mtx);
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}
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union
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{
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struct
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{
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float m_glossiness;
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float m_exposure;
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float m_diffspec;
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float m_time;
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};
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float m_params[4];
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};
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union
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{
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struct
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{
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float m_diffuse;
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float m_specular;
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float m_diffuseIbl;
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float m_specularIbl;
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};
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float m_flags[4];
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};
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float m_mtx[16];
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float m_camPosTime[4];
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float m_rgbDiff[4];
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float m_rgbSpec[4];
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bgfx::UniformHandle u_mtx;
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bgfx::UniformHandle u_params;
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bgfx::UniformHandle u_flags;
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bgfx::UniformHandle u_camPos;
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bgfx::UniformHandle u_rgbDiff;
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bgfx::UniformHandle u_rgbSpec;
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};
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static Uniforms s_uniforms;
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struct PosColorTexCoord0Vertex
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{
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float m_x;
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float m_y;
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float m_z;
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uint32_t m_rgba;
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float m_u;
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float m_v;
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static void init()
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{
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ms_decl
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.begin()
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.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
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.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
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.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Float)
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.end();
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}
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static bgfx::VertexDecl ms_decl;
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};
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bgfx::VertexDecl PosColorTexCoord0Vertex::ms_decl;
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void screenSpaceQuad(float _textureWidth, float _textureHeight, bool _originBottomLeft = false, float _width = 1.0f, float _height = 1.0f)
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{
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if (bgfx::checkAvailTransientVertexBuffer(3, PosColorTexCoord0Vertex::ms_decl) )
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{
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bgfx::TransientVertexBuffer vb;
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bgfx::allocTransientVertexBuffer(&vb, 3, PosColorTexCoord0Vertex::ms_decl);
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PosColorTexCoord0Vertex* vertex = (PosColorTexCoord0Vertex*)vb.data;
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const float zz = 0.0f;
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const float minx = -_width;
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const float maxx = _width;
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const float miny = 0.0f;
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const float maxy = _height*2.0f;
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const float texelHalfW = s_texelHalf/_textureWidth;
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const float texelHalfH = s_texelHalf/_textureHeight;
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const float minu = -1.0f + texelHalfW;
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const float maxu = 1.0f + texelHalfW;
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float minv = texelHalfH;
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float maxv = 2.0f + texelHalfH;
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if (_originBottomLeft)
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{
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std::swap(minv, maxv);
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minv -= 1.0f;
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maxv -= 1.0f;
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}
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vertex[0].m_x = minx;
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vertex[0].m_y = miny;
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vertex[0].m_z = zz;
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vertex[0].m_rgba = 0xffffffff;
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vertex[0].m_u = minu;
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vertex[0].m_v = minv;
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vertex[1].m_x = maxx;
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vertex[1].m_y = miny;
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vertex[1].m_z = zz;
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vertex[1].m_rgba = 0xffffffff;
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vertex[1].m_u = maxu;
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vertex[1].m_v = minv;
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vertex[2].m_x = maxx;
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vertex[2].m_y = maxy;
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vertex[2].m_z = zz;
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vertex[2].m_rgba = 0xffffffff;
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vertex[2].m_u = maxu;
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vertex[2].m_v = maxv;
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bgfx::setVertexBuffer(&vb);
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}
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}
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struct LightProbe
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{
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enum Enum
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{
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Wells,
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Uffizi,
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Pisa,
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Ennis,
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Grace,
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Count
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};
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void load(const char* _name)
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{
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char filePath[512];
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strcpy(filePath, _name);
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strcat(filePath, "_lod.dds");
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m_tex = loadTexture(filePath, BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP|BGFX_TEXTURE_W_CLAMP);
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strcpy(filePath, _name);
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strcat(filePath, "_irr.dds");
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m_texIrr = loadTexture(filePath, BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP|BGFX_TEXTURE_W_CLAMP);
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}
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void destroy()
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{
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bgfx::destroyTexture(m_tex);
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bgfx::destroyTexture(m_texIrr);
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}
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bgfx::TextureHandle m_tex;
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bgfx::TextureHandle m_texIrr;
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};
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int _main_(int /*_argc*/, char** /*_argv*/)
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{
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uint32_t width = 1280;
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uint32_t height = 720;
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uint32_t debug = BGFX_DEBUG_TEXT;
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uint32_t reset = BGFX_RESET_VSYNC;
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bgfx::init();
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bgfx::reset(width, height, reset);
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// Enable debug text.
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bgfx::setDebug(debug);
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// Set views clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 0x303030ff
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, 1.0f
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, 0
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);
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// Imgui.
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imguiCreate();
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// Uniforms.
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s_uniforms.init();
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// Vertex declarations.
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PosColorTexCoord0Vertex::init();
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LightProbe lightProbes[LightProbe::Count];
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lightProbes[LightProbe::Wells ].load("wells");
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lightProbes[LightProbe::Uffizi].load("uffizi");
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lightProbes[LightProbe::Pisa ].load("pisa");
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lightProbes[LightProbe::Ennis ].load("ennis");
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lightProbes[LightProbe::Grace ].load("grace");
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LightProbe::Enum currentLightProbe = LightProbe::Wells;
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bgfx::UniformHandle u_mtx = bgfx::createUniform("u_mtx", bgfx::UniformType::Mat4);
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bgfx::UniformHandle u_params = bgfx::createUniform("u_params", bgfx::UniformType::Vec4);
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bgfx::UniformHandle u_flags = bgfx::createUniform("u_flags", bgfx::UniformType::Vec4);
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bgfx::UniformHandle u_camPos = bgfx::createUniform("u_camPos", bgfx::UniformType::Vec4);
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bgfx::UniformHandle s_texCube = bgfx::createUniform("s_texCube", bgfx::UniformType::Int1);
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bgfx::UniformHandle s_texCubeIrr = bgfx::createUniform("s_texCubeIrr", bgfx::UniformType::Int1);
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bgfx::ProgramHandle programMesh = loadProgram("vs_ibl_mesh", "fs_ibl_mesh");
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bgfx::ProgramHandle programSky = loadProgram("vs_ibl_skybox", "fs_ibl_skybox");
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Mesh* meshBunny;
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meshBunny = meshLoad("meshes/bunny.bin");
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struct Settings
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{
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float m_speed;
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float m_glossiness;
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float m_exposure;
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float m_diffspec;
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float m_rgbDiff[3];
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float m_rgbSpec[3];
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bool m_diffuse;
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bool m_specular;
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bool m_diffuseIbl;
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bool m_specularIbl;
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bool m_showDiffColorWheel;
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bool m_showSpecColorWheel;
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ImguiCubemap::Enum m_crossCubemapPreview;
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};
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Settings settings;
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settings.m_speed = 0.37f;
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settings.m_glossiness = 1.0f;
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settings.m_exposure = 0.0f;
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settings.m_diffspec = 0.65f;
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settings.m_rgbDiff[0] = 0.2f;
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settings.m_rgbDiff[1] = 0.2f;
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settings.m_rgbDiff[2] = 0.2f;
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settings.m_rgbSpec[0] = 1.0f;
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settings.m_rgbSpec[1] = 1.0f;
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settings.m_rgbSpec[2] = 1.0f;
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settings.m_diffuse = true;
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settings.m_specular = true;
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settings.m_diffuseIbl = true;
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settings.m_specularIbl = true;
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settings.m_showDiffColorWheel = true;
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settings.m_showSpecColorWheel = false;
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settings.m_crossCubemapPreview = ImguiCubemap::Cross;
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float time = 0.0f;
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int32_t leftScrollArea = 0;
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entry::MouseState mouseState;
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while (!entry::processEvents(width, height, debug, reset, &mouseState) )
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{
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imguiBeginFrame(mouseState.m_mx
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, mouseState.m_my
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, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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, mouseState.m_mz
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, width
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, height
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);
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static int32_t rightScrollArea = 0;
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imguiBeginScrollArea("Settings", width - 256 - 10, 10, 256, 540, &rightScrollArea);
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imguiLabel("Shade:");
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imguiSeparator();
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imguiBool("Diffuse", settings.m_diffuse);
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imguiBool("Specular", settings.m_specular);
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imguiBool("IBL Diffuse", settings.m_diffuseIbl);
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imguiBool("IBL Specular", settings.m_specularIbl);
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imguiSeparatorLine();
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imguiSlider("Speed", settings.m_speed, 0.0f, 1.0f, 0.01f);
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imguiSeparatorLine();
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imguiSeparator();
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imguiSlider("Exposure", settings.m_exposure, -8.0f, 8.0f, 0.01f);
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imguiSeparator();
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imguiLabel("Environment:");
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currentLightProbe = LightProbe::Enum(imguiChoose(currentLightProbe
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, "Wells"
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, "Uffizi"
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, "Pisa"
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, "Ennis"
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, "Grace"
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) );
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static float lod = 0.0f;
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if (imguiCube(lightProbes[currentLightProbe].m_tex, lod, settings.m_crossCubemapPreview, true) )
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{
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settings.m_crossCubemapPreview = ImguiCubemap::Enum( (settings.m_crossCubemapPreview+1) % ImguiCubemap::Count);
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}
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imguiSlider("Texture LOD", lod, 0.0f, 10.1f, 0.1f);
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imguiEndScrollArea();
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imguiBeginScrollArea("Settings", 10, 70, 256, 576, &leftScrollArea);
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imguiLabel("Material properties:");
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imguiSeparator();
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imguiSlider("Diffuse - Specular", settings.m_diffspec, 0.0f, 1.0f, 0.01f);
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imguiSlider("Glossiness" , settings.m_glossiness, 0.0f, 1.0f, 0.01f);
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imguiSeparator();
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imguiColorWheel("Diffuse color:", &settings.m_rgbDiff[0], settings.m_showDiffColorWheel);
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imguiSeparator();
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imguiColorWheel("Specular color:", &settings.m_rgbSpec[0], settings.m_showSpecColorWheel);
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imguiSeparator();
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imguiLabel("Predefined materials:");
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imguiSeparator();
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if (imguiButton("Gold") )
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{
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settings.m_glossiness = 0.8f;
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settings.m_diffspec = 1.0f;
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settings.m_rgbDiff[0] = 0.0f;
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settings.m_rgbDiff[1] = 0.0f;
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settings.m_rgbDiff[2] = 0.0f;
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settings.m_rgbSpec[0] = 1.0f;
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settings.m_rgbSpec[1] = 0.86f;
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settings.m_rgbSpec[2] = 0.58f;
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}
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if (imguiButton("Copper") )
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{
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settings.m_glossiness = 0.67f;
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settings.m_diffspec = 1.0f;
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settings.m_rgbDiff[0] = 0.0f;
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settings.m_rgbDiff[1] = 0.0f;
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settings.m_rgbDiff[2] = 0.0f;
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settings.m_rgbSpec[0] = 0.98f;
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settings.m_rgbSpec[1] = 0.82f;
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settings.m_rgbSpec[2] = 0.76f;
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}
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if (imguiButton("Titanium") )
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{
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settings.m_glossiness = 0.57f;
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settings.m_diffspec = 1.0f;
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settings.m_rgbDiff[0] = 0.0f;
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settings.m_rgbDiff[1] = 0.0f;
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settings.m_rgbDiff[2] = 0.0f;
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settings.m_rgbSpec[0] = 0.76f;
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settings.m_rgbSpec[1] = 0.73f;
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settings.m_rgbSpec[2] = 0.71f;
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}
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if (imguiButton("Steel") )
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{
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settings.m_glossiness = 0.82f;
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settings.m_diffspec = 1.0f;
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settings.m_rgbDiff[0] = 0.0f;
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settings.m_rgbDiff[1] = 0.0f;
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settings.m_rgbDiff[2] = 0.0f;
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settings.m_rgbSpec[0] = 0.77f;
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settings.m_rgbSpec[1] = 0.78f;
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settings.m_rgbSpec[2] = 0.77f;
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}
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imguiEndScrollArea();
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imguiEndFrame();
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s_uniforms.m_glossiness = settings.m_glossiness;
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s_uniforms.m_exposure = settings.m_exposure;
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s_uniforms.m_diffspec = settings.m_diffspec;
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s_uniforms.m_flags[0] = float(settings.m_diffuse);
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s_uniforms.m_flags[1] = float(settings.m_specular);
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s_uniforms.m_flags[2] = float(settings.m_diffuseIbl);
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s_uniforms.m_flags[3] = float(settings.m_specularIbl);
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memcpy(s_uniforms.m_rgbDiff, settings.m_rgbDiff, 3*sizeof(float) );
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memcpy(s_uniforms.m_rgbSpec, settings.m_rgbSpec, 3*sizeof(float) );
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s_uniforms.submitPerFrameUniforms();
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int64_t now = bx::getHPCounter();
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static int64_t last = now;
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const int64_t frameTime = now - last;
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last = now;
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const double freq = double(bx::getHPFrequency() );
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const double toMs = 1000.0/freq;
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time += (float)(frameTime*settings.m_speed/freq);
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s_uniforms.m_camPosTime[3] = time;
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// Use debug font to print information about this example.
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bgfx::dbgTextClear();
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bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/18-ibl");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Image based lightning.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
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float at[3] = { 0.0f, 0.0f, 0.0f };
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float eye[3] = { 0.0f, 0.0f, -3.0f };
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bx::mtxRotateXY(s_uniforms.m_mtx
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, 0.0f
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, time
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);
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float view[16];
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float proj[16];
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bx::mtxIdentity(view);
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bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
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bgfx::setViewTransform(0, view, proj);
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bx::mtxLookAt(view, eye, at);
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memcpy(s_uniforms.m_camPosTime, eye, 3*sizeof(float) );
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bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
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bgfx::setViewTransform(1, view, proj);
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bgfx::setViewRect(0, 0, 0, width, height);
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bgfx::setViewRect(1, 0, 0, width, height);
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// View 0.
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bgfx::setTexture(0, s_texCube, lightProbes[currentLightProbe].m_tex);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad( (float)width, (float)height, true);
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s_uniforms.submitPerDrawUniforms();
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bgfx::submit(0, programSky);
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// View 1.
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float mtx[16];
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bx::mtxSRT(mtx
|
|
, 1.0f
|
|
, 1.0f
|
|
, 1.0f
|
|
, 0.0f
|
|
, bx::pi+time
|
|
, 0.0f
|
|
, 0.0f
|
|
, -1.0f
|
|
, 0.0f
|
|
);
|
|
|
|
bgfx::setTexture(0, s_texCube, lightProbes[currentLightProbe].m_tex);
|
|
bgfx::setTexture(1, s_texCubeIrr, lightProbes[currentLightProbe].m_texIrr);
|
|
meshSubmit(meshBunny, 1, programMesh, mtx);
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
}
|
|
|
|
meshUnload(meshBunny);
|
|
|
|
// Cleanup.
|
|
bgfx::destroyProgram(programMesh);
|
|
bgfx::destroyProgram(programSky);
|
|
|
|
bgfx::destroyUniform(u_camPos);
|
|
bgfx::destroyUniform(u_flags);
|
|
bgfx::destroyUniform(u_params);
|
|
bgfx::destroyUniform(u_mtx);
|
|
|
|
bgfx::destroyUniform(s_texCube);
|
|
bgfx::destroyUniform(s_texCubeIrr);
|
|
|
|
for (uint8_t ii = 0; ii < LightProbe::Count; ++ii)
|
|
{
|
|
lightProbes[ii].destroy();
|
|
}
|
|
|
|
s_uniforms.destroy();
|
|
|
|
imguiDestroy();
|
|
|
|
// Shutdown bgfx.
|
|
bgfx::shutdown();
|
|
|
|
return 0;
|
|
}
|